Salaries for financial analyst jobs at the manager level can be anywhere from $81,000 to $103,000 at a small company, to $92,250 to $122,000 at a midsize company, and $104,00 to $141,750 at a large company. So as you can see, there's room to grow.
They place the valves as well as the camshaft above the cylinder(s). This means that all OHC engines are technically OHV engines, but not all OHV engines are OHC engines. With fewer moving parts, there are fewer issues that can arise with OHC models. Also, they run cooler and more efficiently than the OHVs.
I can and do use synthetic oil in lawn mowers and other small engines. The newer design engines with overhead valves and overhead cams such as the Honda usually call for multi weight 10w-30 oil. In those engines just use the same weight oil as called for in the manual but in a synthetic such as Mobile-one.